From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24D06C48BCD for ; Thu, 10 Jun 2021 02:03:48 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D1898613BC for ; Thu, 10 Jun 2021 02:03:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D1898613BC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id ACBFA40599; Thu, 10 Jun 2021 02:03:47 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ryHKi6HPOpfk; Thu, 10 Jun 2021 02:03:46 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp4.osuosl.org (Postfix) with ESMTPS id 68E8F40526; Thu, 10 Jun 2021 02:03:46 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 547D3C000E; Thu, 10 Jun 2021 02:03:46 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 168C5C000B for ; Thu, 10 Jun 2021 02:03:45 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id ECCBF83404 for ; Thu, 10 Jun 2021 02:03:44 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Mlta6fDA1ksu for ; Thu, 10 Jun 2021 02:03:44 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by smtp1.osuosl.org (Postfix) with ESMTPS id 27D6F8331B for ; Thu, 10 Jun 2021 02:03:44 +0000 (UTC) IronPort-SDR: kW/Lws7QvJYmWQB/VHODn3q6GtlKiWLVXzixL1oyTC0vqy56qUj5iE4EcPykYM9OLous9r4QeR 9ANSxVJHIPVg== X-IronPort-AV: E=McAfee;i="6200,9189,10010"; a="202184270" X-IronPort-AV: E=Sophos;i="5.83,262,1616482800"; d="scan'208";a="202184270" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jun 2021 19:03:43 -0700 IronPort-SDR: hXqzloBd66UMBFNq4i4ExXwqUpHplmxcLBlkjv2frIWpp8gGhk9RL8LfJDymcUJke4eFcfTOv7 bP1MvFNniCqw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,262,1616482800"; d="scan'208";a="402500470" Received: from allen-box.sh.intel.com ([10.239.159.105]) by orsmga006.jf.intel.com with ESMTP; 09 Jun 2021 19:03:40 -0700 From: Lu Baolu To: Joerg Roedel Subject: [PATCH 15/23] iommu/vt-d: Add cache invalidation latency sampling Date: Thu, 10 Jun 2021 10:01:07 +0800 Message-Id: <20210610020115.1637656-16-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210610020115.1637656-1-baolu.lu@linux.intel.com> References: <20210610020115.1637656-1-baolu.lu@linux.intel.com> MIME-Version: 1.0 Cc: Fenghua Yu , Ashok Raj , Aditya Srivastava , Randy Dunlap , YueHaibing , "Gustavo A . R . Silva" , iommu@lists.linux-foundation.org, Colin Ian King , Will Deacon X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Queued invalidation execution time is performance critical and needs to be monitored. This adds code to sample the execution time of IOTLB/ devTLB/ICE cache invalidation. Signed-off-by: Lu Baolu Link: https://lore.kernel.org/r/20210520031531.712333-1-baolu.lu@linux.intel.com --- drivers/iommu/intel/dmar.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index cae1078cbfec..d66f79acd14d 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -34,6 +34,7 @@ #include #include "../irq_remapping.h" +#include "perf.h" typedef int (*dmar_res_handler_t)(struct acpi_dmar_header *, void *); struct dmar_res_callback { @@ -1342,15 +1343,33 @@ int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc, unsigned int count, unsigned long options) { struct q_inval *qi = iommu->qi; + s64 devtlb_start_ktime = 0; + s64 iotlb_start_ktime = 0; + s64 iec_start_ktime = 0; struct qi_desc wait_desc; int wait_index, index; unsigned long flags; int offset, shift; int rc, i; + u64 type; if (!qi) return 0; + type = desc->qw0 & GENMASK_ULL(3, 0); + + if ((type == QI_IOTLB_TYPE || type == QI_EIOTLB_TYPE) && + dmar_latency_enabled(iommu, DMAR_LATENCY_INV_IOTLB)) + iotlb_start_ktime = ktime_to_ns(ktime_get()); + + if ((type == QI_DIOTLB_TYPE || type == QI_DEIOTLB_TYPE) && + dmar_latency_enabled(iommu, DMAR_LATENCY_INV_DEVTLB)) + devtlb_start_ktime = ktime_to_ns(ktime_get()); + + if (type == QI_IEC_TYPE && + dmar_latency_enabled(iommu, DMAR_LATENCY_INV_IEC)) + iec_start_ktime = ktime_to_ns(ktime_get()); + restart: rc = 0; @@ -1425,6 +1444,18 @@ int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc, if (rc == -EAGAIN) goto restart; + if (iotlb_start_ktime) + dmar_latency_update(iommu, DMAR_LATENCY_INV_IOTLB, + ktime_to_ns(ktime_get()) - iotlb_start_ktime); + + if (devtlb_start_ktime) + dmar_latency_update(iommu, DMAR_LATENCY_INV_DEVTLB, + ktime_to_ns(ktime_get()) - devtlb_start_ktime); + + if (iec_start_ktime) + dmar_latency_update(iommu, DMAR_LATENCY_INV_IEC, + ktime_to_ns(ktime_get()) - iec_start_ktime); + return rc; } -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu